Sid Meier's Alpha Centauri
Sid Meier's Alpha Centauri is a 4X video game, considered a spiritual sequel to the Civilization series. Set in a science fiction depiction of the 22nd century, the game begins as seven competing ideological factions land on the planet Chiron ("Planet") in the Alpha Centauri star system. As the game progresses, Planet's growing sentience becomes a formidable obstacle to the human colonists.
Sid Meier's Alpha Centauri
Alpha Centauri and Alien Crossfire feature similar gameplay. Diplomatic actions are handled in pop-up windows, while combat and unit movement are handled on the isometric field shown in the background. Information such as unit health and status changes are displayed on the black field across the bottom.
4X is a subgenre of strategy-based computer and board games, and includes both turn-based and real-time strategy titles. The gameplay generally involves building an empire. Emphasis is placed upon economic and technological development, as well as a range of military and non-military routes to supremacy.
FreeCol is typical of 4X games where there is a separate interface for managing each settlement.
Sid Meier, the creator of the Civilization series of 4X games